<template>
  <div>
    <!-- 面包屑导航区域 -->
    <Breadcrumb name1="商品管理" name2="分类参数" />
    <!-- 内容主体 -->
    <el-card>
      <el-alert title="注意：只允许为第三级分类设置相关参数！" type="warning" show-icon> </el-alert>
      <!-- 商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader
            expandTrigger="hover"
            clearable
            v-model="selectedKeys"
            :options="catelist"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <!-- 添加参数面板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" @click="addDialogVisible = true" :disabled="!selectedKeys[0]">
            添加参数
          </el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, index) in scope.row.attr_vals"
                  :key="index"
                  closable
                  @close="handleClose(index, scope.row)"
                  >{{ item }}</el-tag
                >
                <!-- 添加新标签 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加新按钮 -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column prop="attr_name" label="参数名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <!-- 修改用户 -->
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showeditDialog(scope.row.attr_id)"
                  >修改
                </el-button>
                <!-- 删除用户 -->
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParamsById(scope.row.attr_id)"
                  >删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性面板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" @click="addDialogVisible = true" :disabled="!selectedKeys[0]">
            添加属性
          </el-button>
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, index) in scope.row.attr_vals"
                  :key="index"
                  closable
                  @close="handleClose(index, scope.row)"
                  >{{ item }}</el-tag
                >
                <!-- 添加新标签 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加新按钮 -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column prop="attr_name" label="参数名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <!-- 修改用户 -->
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showeditDialog(scope.row.attr_id)"
                  >修改
                </el-button>
                <!-- 删除用户 -->
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParamsById(scope.row.attr_id)"
                  >删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加用户 -->
    <el-dialog
      :title="'添加' + titelText"
      width="50%"
      @close="addDialogClosed"
      :visible.sync="addDialogVisible"
    >
      <el-form ref="addFormRef" :model="addForm" :rules="addFormRules" label-width="80px">
        <el-form-item :label="titelText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">提 交</el-button>
      </div>
    </el-dialog>
    <!-- 修改操作 -->
    <el-dialog
      :title="'修改' + titelText"
      width="50%"
      @close="editDialogClose"
      :visible.sync="editDialogVisible"
    >
      <el-form ref="editFormRef" :model="editForm" :rules="editFormRules" label-width="80px">
        <el-form-item :label="titelText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">提 交</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import Breadcrumb from '../Breadcrumb.vue'
export default {
  name: 'Params',
  components: { Breadcrumb },
  data() {
    return {
      catelist: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 级联选择框双向绑定到的数组
      selectedKeys: [],
      activeName: 'many',
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [{ required: true, message: '请输入参数', trigger: 'blur' }]
      },
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [{ required: true, message: '请输入参数', trigger: 'blur' }]
      },
      inputVisible: false,
      inputValue: ''
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类数据失败')
      this.catelist = res.data
    },
    handleChange() {
      this.getParams()
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    editDialogClose() {
      this.$refs.editFormRef.resetFields()
    },
    handleClick() {
      this.getParams()
    },
    async getParams() {
      if (this.selectedKeys.length !== 3) {
        this.selectedKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
        params: { sel: this.activeName }
      })
      if (res.meta.status !== 200) return this.$message.error('获取参数列表失败')

      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          this.$message.error('添加失败')
        }
        this.addDialogVisible = false
        this.getParams()
        this.$message.success('添加成功')
      })
    },
    async showeditDialog(id) {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${id}`, {
        params: { attr_sel: this.activeName }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('查询数据失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('更新失败')
        }
        this.editDialogVisible = false
        this.getParams()
        this.$message.success('更新成功！')
      })
    },
    async removeParamsById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该数据, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除数据失败')
      }
      this.getParams()
      this.$message.success('删除数据成功')
    },
    // 标签文本框失去焦点
    async handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    async saveAttrVals(row) {
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' ')
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('更新失败')
      }
      this.$message.success('更新成功！')
    },
    showInput(row) {
      row.inputVisible = true
      // 让文本框自动获取焦点
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    async handleClose(index, row) {
      const confirmResult = await this.$confirm('此操作将永久删除该数据, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      row.attr_vals.splice(index, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    cateId() {
      if (this.selectedKeys.length === 3) {
        return this.selectedKeys[2]
      }
      return null
    },
    titelText() {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
.el-input__inner {
  width: 300px;
}
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 5px;
}

.input-new-tag {
  width: 120px;
}
</style>
